Check valve



05:. 24, 1933. F. N BARB 1,931,918

CHECK VALVE Filed Aug. 20, 1926 y JO- 6 Patented Oct. 24, 1933 GAB ' CHECK VALVE Francis ,Norwood Bard, Highland Park, lll., as-

slgnor to Walworth Patents Inc., Boston, Mass a corporation oi Massachusetts Application August 20, 1926. Serial No. 130,354; 1 3 Claims. or. 154-105) This invention relates in general to valves and tion 8 and externally threaded, as at 10, more particularly to improvements in check the internally threaded portion 11 of valves. 1 The cap fits snugly through its threa The invention as described and illustrated is shank 9 and may be adjusted to a des 5 particularly adapted to a check valve for use in tion thereon for a purpose which w connection with high pressure systems of lubripresently. cation, and forms a connection between a grease The body is provided witha bore gunor the like and a bearing, the device of this extends-through the shanks 8 and 9 l invention being attached to the bearing or other larged in the shank 9, as indicated 10 element to be lubricated, though it will be underprovide an annular shoulder 14.

stood that the invention finds a wide field of The cap 6 is provided with an inletc utility when employed for other purposes. substantially circular and said opening The principal objects and advantages of this to form an annular plain valve seat 16 i invention reside in the provision oi. an improved a ball valve 17 is adapted to seat. Tl I form of check'valve in whichthe resistance to beyond the seat 16 is enlarged as at 2 g movement of the valve-from its seat is so proameter substantially equal to the di: portioned that sticking of the valve is rendered the'enlargement 13 in the shank pori impossible; the provision of an improved check junction between theenlargement 2C valve in which the valve seat andthe resilient internally threaded portion of the cap 20 member for seating the valve have such contact a'shoulder 21 which overlies the end of with the valve member that sticking of the valve portion 10, and thus permits the cap Ili on its seat is rendered impossible; the provision seat on the hexagonally-shaped fiangl of an improved checkvalve in which the valve The valve 17 is normally maintain chamber housing the valve member and spring seat 16 by a compression coil spring 1E zs contains no projections on which lubricant can substantially irus'to-conical in genera lodge and harden or the spring catch; the proand has its larger end resting on the vision of an improved check valve including an v 14 and its smaller outer end engaging improved construction of springmember; the face of the ball 17. The coil spring 1 I provision of an improved check valve having erably formed of wire which is of a means for adjusting the valve seat; the provilarger than the space between the sh sion of an improved check valve having means and the end of the shank 10 so that tl for adjusting the tension of the valve seatingthe spring will not catch or lodge in resilient member; and the provision of a valve to prevent free operation of the spring of the character described which is small in con- The external surface of the cap 6 I struction, compact and readily taken apart for outer end thereof is provided with'ar cleaning and repair. 1 groove 19 to aiford means for receiving The foregoing and such. other objects and ad= necting a grease gun, not shown.

vantages as may appear or be pointed out as this The advantages of the structure of th description proceeds are attained in the strucinvention reside more particularly in 40 tural embodiment illustrated in the accompanyvision, in combination, of the plain valv i g aw inwhich: ball valve 17, conical coil spring 18.

Figure 1 is a vertical sectional view of a valve rangement, coupled with the readily r embodying the improvements of this invention, features of the cap 6 to permit cleanir and .to eliminate possibility of jamming or Fi u e 2 s plan view of the same. a of the valve. Considerable difficulty 1 Referring now more particularly to the drawencountered by me in employing wei mg, I provide a housing which includes a body makes of check valves for use on lubric: portion 5 and a cap or closure portion 6. I valves for introducing the lubricant, The body 5 is provided with an enlarged hexthe fact that the valves now known t: .50 'as n v shaped rti n 7 and an xternally come clogged and stick and. i: have f0 threaded shank 8 whereby thevbody' 5 may be the ordinary helical spring hinders the screwed into apearing or other element to receive or the lubricant into the bearing. By th ,liibrication. invention the valve has a relatively s! =-'1he body' 5 is also provided with a shank porface of contact with the seat and there: tion', 9, extending oppositely from the shank pornot stick on the seat. It W111 be obsez ne surface of the valve seat and the curved of the ball'aiford an annular tapered.

into which the lubricant or other fluid pressure is forced to tend to wedge the f its seat and thus facilitate opening to entrance. Furthermore, the' tension of ring 18 may be adjusted by threading the :o the. desired point although'in the usual itiori the .cap is screwed home as shown are convolutions of the spring 18, when comd, allow a greater area of passageway irough than in the conventional form of spring, owing to the successive lateral :ement of each convolution. Thus the 18 serves to facilitate the passage of heavy past the valve and into the bearing. are no projections in the parallel-sided chamber on which the spring may catch which lubricant may lodge and harden \us clog the valve. ing thus described my invention and illusits use, what I claim as new and desire to by Letters Patent is:

1 a valve device, a body having a reduced ally threaded shank portion at one end, said Ieing provided with an axial bore, an exterthreaded shank at the other: end of said' ontaining an enlargement of said bore dean 'intemal annular shoulder, a cap mem .readedly engaging the last named shank vne terminal end seated on the body, saidthe shoulder and the other end engaging.

all and urging it against its seat. ti a valve device, a body having a reduced ially threaded shank portion at one end,

ody being provided with an axial bore, an

[ally threaded shank at the other end of said :ontaming an enlargement of'said bore defining an internal annular shoulder and an annular end face, a cap member having a threaded portion thereon engaging the last named shank with one end of said portion seating on the body and the other overlying the annular end face of the threaded shank but being spaced therefrom to in-' of said cap member and extending from said opening, a ball valve member adapted to engage said seat and being movable both laterally and longitudinally in the valve chamber, and a spring having one end seated on the shoulder and the other end engaging said ball and urging it against its seat.

3. In a valve device, a body having a reduced externally threaded shank portion at one end, said body being provided with an axial bore, an externally threaded shank at the other end of said body containing an enlargement of said bore defining an internal annular shoulder and an annular end face, a cap member having a threaded portion thereon engaging the last named shank with one end Ofsaid portion seating. on the body andthe other overlying the annular end face of the threaded shank but being spaced therefrom to in'-' sure said seating, said cap having an opening therein extending from the overlying end and being of substantially the same'size as said enlarge.- ment, and arranged to form in conjunction therewith a plain cylindrical valve chamber, a fr usto--- conical valve seat adjacent the other terminal endof said cap member and extending from said opening, a ball valve member adapted to engage said seat and being movable both laterally and longitudinally in the valve chamber and a helical coil spring having one end seated on the shoulder and the other end engaging the ball and urging it against its seat, said spring having a wire size larger than the space between the cap and the shank to prevent catching of the spring.

FRANCIS NORWOOD BARD. 

